US1682547A - Electricity meter - Google Patents

Description

Aug. 2a, 192& 1,682,547

W. BEUSCH ELECTRICITY METER Filed Aug. 1923 Fig] Invenlor:

Patented Aug. 28, 1928.

UNITED STATES PATENT OFFICE.

WILLI BEUSCH, OF ZUG, SWITZERLAND, ASSIGNOR TO THE FIRM LANDIS & GYR A.-G., OF ZUG, SWITZERLAND.

ELECTRICITY METER.

Application filed August 6, 1923, Serial No. 656,042, and in Switzerland August 18, 1922.

The invention relates to electricity meters of the Ferraris type and more particularly to the motor mechanlsm thereof.

It has been proposed in meters of the type described to provide the pressure magnets with counterpoles. When employing such counterpoles care must be taken in the first place that the electrical properties which such a driving system should have are in no way impaired by the counterpoles, and secondly that the mechanical connection between the pressure magnet and the main current magnet is not hampered by the counter-poles. The object is to attain the best possible electrical properties andat the same time a rigid connection between the pressure magnet and the main current magnet.

This object is attained by constructing the counterpole fromthe laminations of the pressure core which project downwards and to which the supports or brackets for mounting the main current magnet are rigidly fixed.

In the accompanying drawings two preferred forms of the invention are shown by way of examples Fig. 1 shows part of an electricity meter with the motor mechanism in front elevation.

Fig. 2 is a side elevation thereof, the main current magnet being removed.

Fig. 3 is a perspective view showing the lower portion of a modified form of the pressure magnet.

The motor mechanism consists of sheet metal laminations carrying shunt and series coils, 1 denoting the laminations on which the shunt coil is arranged.

Some of the laminations 2 of the centre portion of the pressure magnet project vertically downwards well beyond the other laminations, and on these laminations 2 the connterpole 3 is formed consisting of projections or arms running horizontally and parallel to the horizontal limb of the pressure magnet. In the air gap between the limb and the said counterpole 3 the disc of the meter rotates. To make the counterpole rigid and to hold the laminations tightly together I employ a rivet 4 placed near their ends: one or more rivets may be placed at or near the middle of the counterpole to make the counterpole still more rigid. On either side of the laminations 2 a bracket 5 is arranged; the brackets are rigidly fixed to said parts 2 by bolts 6. The brackets 5 are provided with lugs 7 arranged in a common plane. Each lug 7 is provided with a hole 8. The brackets 5 support the main current magnet which is fastened thereto by bolts passing through said holes 8.

The pressure magnet might also be constructed as shown in Fig. 3. The laminations of the pressure magnet arranged in the middle of the bundle are provided with arms which protrude horizontally and form the counterpole 3'. On both sides of said counterpole 3 ' laminations 9, 10 project downwards, and between the laminations 9, 10 are arranged the lugs 5 of the bracket on which is mounted the main current magnet.

With the described construction and arrangement of the parts the electrical properties of the motor mechanism satisfy all'demands and at the same time the pressure magnet and the main current magnet are rigidly united.

What I claim as new and desire to secure by Letters Patent of the United States is:

1. An induction meter comprising in combination a laminated pressure core, a laminated core for the main current magnet, two spaced apart groups of laminations of the pressure core being extended down as far as the lower edge of the main current magnet core, the center group of laminations ot the pressure core between said two spaced apart groups being extended to form a counterpole at about the level of the top of the main current magnet, the center laminations terminating with the counterpole and leaving a space below them, and a bracket positioned in the space below the counter-pole and having arms for supporting the main current magnet.

2. The combination as claimed in claim 1 in which the two spaced apart groups of laminations are flanked on the outside by lamina tions of the pressure core. which outside laminations terminate at the level of the counterpole.

In witness whereof I aflix my signature.

WILLI BEUSCH.

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